1,720,956 research outputs found
Accidental neck and chest penetration by a metal sliver derived from an axe for wood chopping: A case report
Full text linkBackground: Penetrating neck and chest trauma is a very common entity in emergency medicine that usually requires surgical treatment. Our case report illustrates the case of a 27-year-old Arabian man with hemopneumothorax associated with pneumomediastinum due to an unusual occupational injury. Case presentation: A metal sliver, coming from an axe using for wood chopping, penetrated the neck of a 27-year-old Arabian man in the left supraclavicular region mimicking a gun bullet; the entrance hole was at the left pleural dome where the sliver had just penetrated the apex of the lung passing through the upper lobe of his left lung creating an exit wound in the dorsal segment of the same lobe arriving in the posterior thoracic wall. Biportal video-assisted thoracic surgery was performed to remove blood clots and the unusual foreign body. Conclusion: In the literature, there are several case series about this topic, with some of them reporting unusual foreign bodies that lead to penetrating trauma. However, to the best of our knowledge, no cases like the one we have reported are described in the current literature
Robotic resection of mediastinal goiter and ectopic thyroid
No full textThe last 10 years showed a wild diffusion of mini-invasive thoracic procedures for lung and
mediastinum diseases. Mediastinal goiters, ectopic thyroids and forgotten goiters represent rare thoracic
diseases, treated in the past by sternotomy, thoracotomy or combined cervicosternotomy. The evolution of
robotic assisted thoracic surgery seems to offer a valid therapeutic option also in patients with thoracic and
cervicothoracic thyroid correlate diseases. However some contraindications and technical aspects must be
taken in account to achieve the best surgical results and patients satisfaction
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
RUOLO PROGNOSTICO DELLE METASTASI LINFONODALI DELLA STAZIONE MEDIASTINICA 5 NELLA NEOPLASIA POLMONARE NON A PICCOLE CELLULE DEL LOBO SUPERIORE SINISTRO
No full textLa prognosi dei pazienti affetti da tumore del polmone non a piccole cellule (Non-Small Cell Lung Cancer, NSCLC) è fortemente condizionata dalla presenza di metastasi linfonodali riscontrate alla diagnosi od in sede intraoperatoria. Tuttavia le singole metastasi linfonodali di alcune stazioni mediastiniche sembrano mostrare una prognosi più favorevole di altre.
In questo lavoro, abbiamo analizzato retrospettivamente l’impatto delle singole metastasi linfonodali in stazione 5 sulla sopravvivenza dei pazienti sottoposti ad intervento chirurgico radicale per NSCLC a carico del lobo polmonare superiore sinistro (LSS) presso il Reparto di Chirurgia Toracica dell’Ospedale di Siena da gennaio 2009 a dicembre 2019. In particolare abbiamo confrontato la sopravvivenza di tali pazienti (GRUPPO 3, n =20) con quella dei soggetti senza interessamento linfonodale (GRUPPO 1, n=109), con coinvolgimento puramente ilare (GRUPPO 2, n=24) oppure con metastasi alle altre stazioni mediastiniche (singola o multiple) (GRUPPO 4, n= 10). Inoltre, all’interno del GRUPPO 3, abbiamo comparato tra loro gli individui con metastasi “skip” (GRUPPO 3B, n=10) e i soggetti con metastasi “non-skip (GRUPPO 3A, n=10).
Dall’analisi dei dati è emerso che, seppur in assenza di significatività statistica, i pazienti con metastasi linfonodale singola della stazione 5 (GRUPPO 3) sembrano avere una prognosi peggiore rispetto ai pazienti N0 (GRUPPO 1), ma leggermente migliore rispetto ai pazienti con metastasi linfonodali ilari. Essi hanno inoltre una sopravvivenza nettamente migliore rispetto ad altri pazienti con altra metastasi linfonodale mediastinica, singola o multipla. All’interno del gruppo dei pazienti con singola metastasi in stazione 5, i pazienti con metastasi skip hanno mostrato una prognosi leggermente migliore rispetto a quelli con interessamento linfonodale ilo-mediastinico.
I dati, seppur privi di significatività statistica, appaiono in linea con la letteratura corrente. La poca numerosità del campione preso in esame e l’eterogeneità clinica dei pazienti arruolati costituiscono dei limiti che non permettono di trarre conclusioni univoche. Studi multicentrici con analisi multivariate saranno necessari per indagare campioni più ampi e significativi al fine di definire correttamente il ruolo prognostico della stazione mediastinica 5
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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